JPS5885977A - Magnetic disk storage device - Google Patents

Abstract

PURPOSE:To prevent the condensation on the surface of a magnetic disk and to avoid a trouble due to head crash, by keeping the internal humidity of a storage device within a prescribed range with use of a condensation sensor, a resistor and a ventilator. CONSTITUTION:When the relative humidity in a deck 1 reaches approximately 100%, the resistance value of a condensation sensor 11 increases. This increment of the resistance value is detected by a control circuit 12. The detection signal is fed to a positive characteristic heat-sensitive resistor 13 and a ventilator 14 to turn them on. The heat generated from the resistor 13 is sent into the deck 1 by the ventilator 14 as the warm air. Thus the inside of the deck 1 is warmed up to drop the relative humidity. When the relative humidity dropped down to a prescribed level, the resistance value of the sensor 11 also drops. This drop of the resistance value is detected by the circuit 12. Then the resistor 13 and the ventilator 14 are turned off.

Description

【発明の詳細な説明】 この発明は磁気ディスク記憶装置（以下記憶装置と略す
）の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in magnetic disk storage devices (hereinafter abbreviated as storage devices).

記憶装置は、データの読み書き以外の保管時（例えば夜
間等）記憶装置にデータバックを装着したままの状態に
すると、データバック内の磁気円板の表面には空気中の
水分が付着し、更にその水分が飽和状態になると、磁気
円板の表面が結露し、更にその表面に埃が付着し、記憶
装置を使用する際にヘッドクラ７エをし、データを破壊
するという重大な事故が発生することがある。If a storage device is stored with a data bag attached to the storage device for purposes other than reading or writing data (e.g. at night), moisture in the air will adhere to the surface of the magnetic disk inside the data bag, causing further damage. When the moisture becomes saturated, dew condenses on the surface of the magnetic disk, and dust adheres to the surface, causing serious accidents such as head scratches and data destruction when using the storage device. Sometimes.

このため出願人はすでに特開昭５３−８３７２３号及び
実開昭５５−９０００２号にて、デツキ内の温度を所定
温度範囲内に保ちつつデツキ内の相対湿度を制御するこ
とを提案している。For this reason, the applicant has already proposed in JP-A No. 53-83723 and Utility Model Application No. 55-90002 to control the relative humidity inside the deck while keeping the temperature inside the deck within a predetermined temperature range. .

この発明は上記各出願でのべた記憶装置の一層の改１１
に関するもので、その特徴とするところは、デツキ内の
所定位置に結露センナを設け。This invention is a further improvement 11 of the storage device described in each of the above-mentioned applications.
The feature is that a condensation sensor is installed at a predetermined position inside the deck.

デツキ内の相対湿度が飽和状態になり、露点に近づくと
その検出信号を他の所定位置に設けた熱源となる正特性
感熱抵抗体（以下抵抗体と略す）に送夛、この抵抗体か
ら発圧する熱を送風機によって送風し、デツキ内の温度
を上昇（下降）させてデツキ内の相対湿度を制御するよ
うにした所にある。When the relative humidity inside the deck reaches a saturated state and approaches the dew point, the detection signal is sent to a positive characteristic heat-sensitive resistor (hereinafter referred to as a resistor) that serves as a heat source installed at another predetermined location, and the heat is emitted from this resistor. The compressed heat is blown by a blower to raise (lower) the temperature inside the deck and control the relative humidity inside the deck.

以下図をおって説明する。This will be explained below with reference to the drawings.

第１図はこの発明による記憶装置の一実施例を示す図で
、（１１は機構部デツキ、（２）はスピンドル、　　（
３ａ）　（３ｂ）は磁気円板、　　（４Ｍ）（仙）紘磁
気ヘッド、　　（５ａ）　（５ｂ）はへラドアーム、Ｃ
Ｏは防塵カバー。FIG. 1 is a diagram showing an embodiment of the storage device according to the present invention, in which (11 is a mechanism deck, (2) is a spindle, (2) is a spindle, (
3a) (3b) is a magnetic disk, (4M) (Sen) Hiro magnetic head, (5a) (5b) is a helad arm, C
O is a dust cover.

（６）はアクチェータ、（７）はスピンドルモータ、（
８）（９）はプーリ、（至）はベル）、（Ｉｌｌは上記
防塵カバー■で囲まれた磁気円板収納空間内において例
えば′ａ＃１１部デツキに取付けた結露センサ、α２は
このセンサを入力信号とする制御回路、１２１＋は上記
磁気円板収納空間に遅過する。０は　　に設けた送風路
、（１３及びα少はこの送風路に設けた温風発電源とな
る正特性感熱抵抗体及び送風機である。(6) is the actuator, (7) is the spindle motor, (
8) (9) is the pulley, (to) is the bell), (Ill is the dew condensation sensor installed on the deck of section 'a#11' in the magnetic disk storage space surrounded by the above dustproof cover ■, α2 is this sensor A control circuit whose input signal is 121+ is delayed to the above-mentioned magnetic disc storage space. body and blower.

第２図は上記結露センナａｌｌの詳細図、＃Ｉ３図は第
２図の１−１１１面図で、（至）は感湿抵抗皮膜。Fig. 2 is a detailed view of the dew condensation sensor all, Fig. #I3 is a 1-111 view of Fig. 2, and (to) the moisture-sensitive resistance film.

叫は電極、αηは絶縁基板、側はり一ド線である。The symbol is an electrode, αη is an insulating substrate, and the side beam is a single lead wire.

第４図は上記結露センサ０の感湿特性図で。FIG. 4 is a moisture sensitivity characteristic diagram of the dew condensation sensor 0.

相対湿度９４チ朋以上で急激な抵抗値の増大を−示し、
相対温度Ｚｏｏ係近傍ま友は結露を選択的に検出できる
ようになっている。Shows a rapid increase in resistance at relative humidity of 94 degrees or higher,
The relative temperature Zoo is designed to selectively detect dew condensation.

Ｉａ５図は上記抵抗体Ｕの外観図で、　（１９は貫通孔
である。＃Ｉ６図は上記貫通孔■を送風し走時の、風量
−発熱量特性を示す図で９発熱量が空気の流量によって
変化する事を示す。Figure Ia5 is an external view of the resistor U. (19 is the through hole. Figure #I6 is a diagram showing the air volume vs. heat generation characteristic when running with air blown through the through hole (9). Indicates that it changes depending on the flow rate.

次に上記構成よシなる記憶装置の動Ｐ￥ｆｔ説明する。Next, the operation P\ft of the storage device having the above configuration will be explained.

第１図においてデツキ内の相対湿度が１００近傍になる
と上記結露センサＵの増大した抵抗値を上記制御回路■
が検出し、検出信号を上記抵抗体０および送風機α４１
に送＃）ＯＮ状態にする。そして抵抗体０から発生する
熱を送風Ｉ！（１４１によシ温風としてデツキ内に送風
して温め、なおかつ相対湿度を低下させる。In Fig. 1, when the relative humidity inside the deck approaches 100, the increased resistance value of the dew condensation sensor U is controlled by the control circuit
detects the detection signal and sends the detection signal to the resistor 0 and the blower α41.
Send it to #) and turn it on. Then, the heat generated from the resistor 0 is blown out I! (In step 141, hot air is blown into the deck to warm it up and reduce the relative humidity.

更に相対湿度が所定の湿度まで低下すると上記センナ曲
の抵抗値も小さくな）、この小さくなった抵抗値を上記
制御回路口が検出して、検出信号を上記抵抗体■と送風
機α少に送シＯＦＦ状態にするのである。Furthermore, when the relative humidity decreases to a predetermined humidity, the resistance value of the above-mentioned Senna curve also becomes small), and the above-mentioned control circuit port detects this reduced resistance value, and sends a detection signal to the above-mentioned resistor ■ and the blower α. The switch is turned off.

この発明は以上のように記憶装置の内部湿度を結露セン
ナと抵抗体および送風機を使用して所定湿度範囲内に保
つようＫなっているため磁気円板の表面の結露が防止で
き、ヘッドクラッシ為の重大事故が防止できるので実用
的価値が大である。As described above, this invention uses a condensation sensor, a resistor, and a blower to maintain the internal humidity within a predetermined humidity range, thereby preventing dew condensation on the surface of the magnetic disk and preventing head crashes. This has great practical value as it can prevent serious accidents.

【図面の簡単な説明】[Brief explanation of drawings]

第１図はこの発明の一実施例による記憶装置の概略構成
を示すｌｒ［Ｉ図、第２図は結露センナの詳細図、第３
図は第２図の１−１１ｈ面図、第４図は結露センナの感
湿特性図、第５図は正特性感熱抵抗体の外観図、第６図
は同抵抗体の風量−発熱量特性を示す図である。 図中１１）は機構部デツキ、　　（３ｇ）（３ｂ）は磁
気円板。 （４ａ）　（４ｂ）はヘッド、０１１は結露センナ、ａ
２は制御回路、Ｑ３は正特性感熱抵抗体、圓は送風ＩＦ
ｍ、■は防塵カバー、１２］Ｊは送風路である。 なお図中、同一ある−は相当部分には同一符号を付して
示しである。 代理人　葛野信− １１１１１ 第２図 １Ｉ４図 相対Ｊ＆（％） ｊ１５図 １９ 籐　６ａ１１ 規ｆ　　（”’／つλ〕 ４２７−FIG. 1 shows a schematic configuration of a storage device according to an embodiment of the present invention.
The figure is a 1-11h plane view of Fig. 2, Fig. 4 is a moisture sensitivity characteristic diagram of a dew condensation sensor, Fig. 5 is an external view of a positive characteristic heat-sensitive resistor, and Fig. 6 is an air volume vs. heat generation characteristic of the same resistor. FIG. In the figure, 11) is the mechanism deck, and (3g) and (3b) are the magnetic discs. (4a) (4b) is the head, 011 is the condensation sensor, a
2 is a control circuit, Q3 is a positive characteristic heat-sensitive resistor, and circle is a blower IF.
m and ■ are dustproof covers, and 12] J is a ventilation path. In the drawings, the same reference numerals are attached to corresponding parts. Agent Makoto Kuzuno- 11111 Figure 2 1I4 Relative J & (%) j15 Figure 19 Rattan 6a11 Standard f (''/tsuλ) 427-

Claims (1)

【特許請求の範囲】 機構部デツキの所定位置に結露センサを設Ｃすて磁気デ
ィスク記憶装置内部の相対湿度を検出し、この検出信号
を機構部デツキの別の所定位置に設けた温風発生源に送
って温風発生源を制御して上記磁気ディスク記憶装置内
部の相対湿度を所定の範囲内に＠御するよう構成すると
共に、上記温風発ｇＥ源に正特性感熱抵抗体を設け。 この正特性感熱抵抗体から発圧した熱を送風機忙よって
送風する事を特徴とする磁気ディスク記憶装置。[Claims] A dew condensation sensor is provided at a predetermined position on the mechanism deck to detect the relative humidity inside the magnetic disk storage device, and this detection signal is provided at another predetermined position on the mechanism deck to generate warm air. The hot air generator is configured to control the relative humidity inside the magnetic disk storage device within a predetermined range by controlling the hot air generating source, and the hot air generating source is provided with a positive temperature sensitive resistor. A magnetic disk storage device characterized in that the heat generated under pressure from the positive characteristic heat-sensitive resistor is blown by a blower.